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Finding the Fourth Proportional to 66,809.55, 100,228.67 and 19,425.46

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Solution

The fourth proportional to 66,809.55, 100,228.67 and 19,425.46 is: 29,142.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,809.55 : 100,228.67 = 19,425.46 : x
  2. Step 2: Convert to fraction form
    66,809.55/100,228.67 = 19,425.46/x
  3. Step 3: Cross multiply
    66,809.55x = 100,228.67 × 19,425.46
  4. Step 4: Simplify right side
    66,809.55x = 1,946,988,019.94
  5. Step 5: Solve for x
    x = 1,946,988,019.94/66,809.55
  6. Step 6: Final answer
    x = 29,142.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.